How to load ini files and connect to Oracle in VisualStudio 2008

I don't know what you're looking for, but if you want to answer a question.

Will you be using the API ODBC;Microsoft Open Database Connectivity?ODBC has a separate interface and driver.

• Interface portion
  It was standardized on the operating system a long time ago and can be called anytime.
• Driver portion
  • ODBC Driver for Oracle
    Because of the standard OS installation a long time ago, only the 32-bit version remains.The 64-bit version is not available.Also, I'm not sure if I can connect to the desired version of Oracle (it says Oracle 8 is limited).
  • Instant Client ODBC Software
    Drivers distributed by Oracle.

• ODBC Driver for Oracle
  Because of the standard OS installation a long time ago, only the 32-bit version remains.The 64-bit version is not available.Also, I'm not sure if I can connect to the desired version of Oracle (it says Oracle 8 is limited).
• Instant Client ODBC Software
  Drivers distributed by Oracle.

There is a C/C++ ODBC sample application by Microsoft.The code itself is connected to SQL Server, but as mentioned above, the interface part you are working on is the same, so it will be helpful if you select the appropriate connection destination.However, the project files are in .vcxproj and Visual Studio 2010 and later formats, so you may refer to .cpp/.h.

Well, if you want to limit yourself to Oracle, Oracle C and C++ Interfaces offers other connectivity options.